<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id = "app">
        <input type="text" v-model="mytext">
        <ul>
            <li v-for="data in mymethods()">
                {{data}}
            </li>
        </ul>
    </div>
    <script>
        var vm = new Vue({
            el:"#app",
            data:{
                mytext:'',
                dataList:["aab","aac","bbc","ccd","ddd"]
            },
            methods:{
                mymethods(){
                    return this.dataList.filter(item=>item.includes(this.mytext))
                }
            }
        })
    </script>
</body>
</html>